Rendering Error

I have a serious problem. well, i made a short video and rendered it to see what it would look like, because when i try to render videos for some strange reason, the dimensions get extremly small and when i try to play them back on my computer.... The audio is present but you cannot see the video, is there any way i can fix this? There's a project i've been working hard on and it would be devestating if my video turned out like that. And in the example below, i wasn't really trying to render it (just needed an example). Could this be because I selected the NTSC standard 720*486 format? I thought that was a common format to use :/ This is extremly aggrivating and quite frankly, i have no idea how to fix this.
Here's an Example of what i'm talking about:

well the project settings were set to be at NTSC standard 720*486, and i didn't download the videos anywhere i havn't before if thats what you mean. the frame rate is set to 29.970 (NTSC), and the full resolution rendering quality is set to 'Good' however i find it strange when i change it to best it actually gets worse :s, the pixel aspect ratio is 0.9091 (NTSC DV). I really don't know what could be the problem, maybe its just that the video is too big? when i changed it to Multimedia (320x240, 15.000 fps) the resolution didn't change during rendering. Its blows me away that the video can't show up, i honestly don't think i've changed the property settings to have it behave this way.

Yes, it is a Divas' match in the above snapshot. But he asked for information about the rendering settings and i thought i answered them. I don't actually understand what was being asked so i answered the best i could.